luck balance hacker rank solution javascript

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Javascript program for luck balance hackerrank solution

function luckBalance(k, contests) {

    let array = [], sum = 0;

    for (let i = 0; i < contests.length; i++) {

        if (contests[i][1] == 1) {
            array.push(contests[i][0]);
        }

        sum += contests[i][0];

    }

    array.sort((a, b) => a - b);

    for (let i = 0; i < array.length - k; i++) {

        sum -= 2 * array[i];

    }

    return sum;

}

Time Complexity : O(n)

Space Complexity : O(n)